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Elements with the atomic number between 98 and 118; other elements as Pm, Tc, Pu, Np, Cm, Am, Bk were first obtained in laboratory and only after they were discovered in nature in extremely low traces.
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∙ 11y ago
Patrick Osborne
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What are elements called when they are found in nature?
Elements found in nature are referred to natural elements, as opposed to synthetic, which are man made.
What are elements that are made in lab called?
Synthetic is the term you are looking for i believe.
Elements that occur somewhere on earth are what?
The planet Earth and everything on it, including us, is composed of the chemical elements. Not only are elements found on Earth, but everything found on Earth is made of elements.
Elements past 92 are considered what?
Trans-uranic, man-made, artificial.
75 percent of the elements on the periodic table are what?
Most of the elements in the periodic table of elements are metals. Also, most of them are made by nature. Elements with the atomic number of 1-91 are made by nature. Elements with the atomic number of 92-118 are man-made.
How many man made elements are in the periodic table?
Out of the 112 elements known, 90 are found in nature and the rest (22 are man made).
How do you make man made elements?
Man-made elements are made in a particle accelerator.
How many are man made elements of the 118 known elements?
The 26 transuranic elements (elements with atomic numbers higher than 92) are man-made. Some lists also count technetium (element 43) as man-made as well. --------------- Now (January 2013) 97 chemical elements are considered as natural and 21 as man made.
Are man made elements important in health and medicine?
Yes but many of them are harmful to both man and plants...
Are most elements man made or natural?
All the existing elements are natural the man made elements are rare and have a very short life.
If they are man made then how are they elements?
Examples of man made elements: curium, californium, bohrium, mendelevium, nobelium etc.
Are man made elements stable?
Yes they are everything around you is man made.
Total no of elements known to man?
112 Elements ( 92 Natural and 20 Man-made ) .
5 man made elements of lights?
The 5 man made elements of light is xenon,krypton,argon,neon,and helium.
Is rubber man made?
Rubber is man-made but has natural agents.
How many elements are made by man from the periodic table?
Man has not "made" any eleents, but many of the elements on the periodic table do not naturally occur in their purist form in the crust, and some are so unstable that they can only exist for a few seconds after we have produced them in a reaction.
How many groups of elements are there in the modern periodic table?
4 (including man-made metals)
